This spectrograph map, generated from data collected by NASA's New Horizons probe, depicts the relatively uniform brightness of the ultraviolet "Lyman-alpha" background surrounding our Sun and its area of influence.

New Horizons' new map of the galaxy | Space photo of the day for April 30, 2025

Source: space
Source Link: https://www.space.com/space-exploration/new-horizons/new-horizons-new-map-of-the-galaxy-space-photo-of-the-day-for-april-30-2025